I have eaten french fries from most popular fast food joints. McDonald's has been the best by far.

Crisp & crunchy on the outside yet moist inside, still maintaining the potato taste. Also it does not go soggy after taking it out of the deep-frier. I have tried my best to recreate what they do, I even went to great lengths to get their pre-fried fries from their outlet.

If you are care about aspects other than texture... You might be interested to know that McDonald's fries are beef flavoured.

In The book fast food nation it is pointed out that McDonald's fries distinctive flavour comes from the fact that they were cooked in 'beef tallow' (lard). In the 90s they stopped doing this and moved over to vegetable oil but started adding artificial flavourings to keep the lard flavour.